Roof Valley Water Flow Issues

And even without gutter covers in a down pour the gutters may be overwhelmed with rain water and overflow.

Roof valley water flow issues.

If rainwater cascading down your roof valley causes a waterfall that washes out the petunias every time it storms do this simple fix. It costs only a few dollars and takes about 20 minutes to complete. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley. Since this area of the roof acts more like a river due to the convergence of two roof surfaces the water flows down the valley at a high rate of speed.

This has been a classic problem for most gutter guard manufacturers. This is not a good situation as water then flows to vulnerable areas of the home and causes significant damage. Most shingle installers will use a thick 30 lb paper as a base for the valley. Eliminates the hazard of owerflowing water and ice and prevents dangerous slip and fall accidents.

Most roofers that do shingles will use a heavy base paper instead of a rubber membrane. After the installation of gutter protection water could overshoot the gutters at this point. The consequences of backwater laps are leaks and blisters which can lead to roof failure care explains. Roof valley rain water diverter is the only product on the market that solves the problem of overflowing water on an a roof.

When your gutters are clogged water is not able to flow away from the edge of the roof. It prevents rain water from cascading on the inside corners of the shingle roof. Especially during heavy rain. The reason why the roof valley is such a sensitive area has to do with all the rainwater and or melting snow that accumulates and flows through the valley on its way into the gutters.

Water can get under the membrane if the field of roof is installed so that water flows against the lap. If you have a low pitched roof the leaves tend to sit on the top of gutter covers because water does not have enough momentum to wash off the leaves that naturally sit on top of the gutter covers. A roof valley is very prone to leaks especially if you have an older roof. Inadequate head laps and backwater laps are another mod bit installation problem that can allow moisture infiltration.

A roof valley acts like a funnel channeling large volumes of water at a high velocity. Take care not to place any fasteners in the exposed center area of the metal flashing. Water like to follow the valley to the edge and flow back under the valley.